function [ status ] = mx_eyelink_node_send_message( node, msg )
%MX_EYELINK_NODE_SEND_MESSAGE Sends a text message the connected eye tracker.
% The text will be added to the EDF file.
%
% Remarks:
% NEW (v2.1): If the link is initialized but not connected to a tracker, the 
% message will be sent to the tracker set by set_eyelink_address().
% Parameters:
% msg 	Text to send to the tracker.
% node 	Address of the tracker.
% Returns:
% 0 if no error, else link error code.
%
%----------------------------------------------------------------------------
% Copyright Eduardo Aponte 2013
% aponteeduardo@gmail.com